{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:SFMDK2ZUFYLYSHK54AZC3F6RAC","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"42399b967a724247623e2a0905ab5ed22c0a9e8193de708b7d2890a565fc988e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-19T21:27:11Z","title_canon_sha256":"d71a0b7986469fb86198451beb13c10f039a7fbd0d17043148e6c8d83a48e476"},"schema_version":"1.0","source":{"id":"astro-ph/0610606","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0610606","created_at":"2026-05-18T01:32:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0610606v1","created_at":"2026-05-18T01:32:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0610606","created_at":"2026-05-18T01:32:19Z"},{"alias_kind":"pith_short_12","alias_value":"SFMDK2ZUFYLY","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"SFMDK2ZUFYLYSHK5","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"SFMDK2ZU","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:bd88486c72cf72992e46535f679dc66f4a3b972d82bedf99514a395b937d45ff","target":"graph","created_at":"2026-05-18T01:32:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We describe a new technique for measuring accurate galaxy colours from images taken under different seeing conditions. The method involves two ingredients. First we define the Gaussian-aperture-and-PSF flux, which is the Gaussian-weighted flux a galaxy would have if it were observed with a Gaussian PSF. This theoretical aperture flux is independent of the PSF or pixel scale that the galaxy was observed with. Second we develop a procedure to measure such a `GaaP' flux from observed, pixellated images. This involves modelling source and PSF as a superposition of orthogonal shapelets. A correctio","authors_text":"Konrad Kuijken (Leiden Observatory, Leiden University)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-10-19T21:27:11Z","title":"GaaP: PSF- and aperture-matched photometry using shapelets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0610606","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9f18f2759a3d18ecf58aae8a4a126c5418ef1a41ffcc5bbaaa9180e42f66fd73","target":"record","created_at":"2026-05-18T01:32:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"42399b967a724247623e2a0905ab5ed22c0a9e8193de708b7d2890a565fc988e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-19T21:27:11Z","title_canon_sha256":"d71a0b7986469fb86198451beb13c10f039a7fbd0d17043148e6c8d83a48e476"},"schema_version":"1.0","source":{"id":"astro-ph/0610606","kind":"arxiv","version":1}},"canonical_sha256":"9158356b342e17891d5de0322d97d1008c679bb3c6446537e7c1cd7cbc84d7b8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9158356b342e17891d5de0322d97d1008c679bb3c6446537e7c1cd7cbc84d7b8","first_computed_at":"2026-05-18T01:32:19.444698Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:19.444698Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pXiHVUlx5KiR+I3HT69tji05zySyYogrBmKmPRIQ9ZqcP/n19ZboeX7qkLzrR0xFw8ChW3JfNBCK2NtoiBEEDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:19.445264Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0610606","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f18f2759a3d18ecf58aae8a4a126c5418ef1a41ffcc5bbaaa9180e42f66fd73","sha256:bd88486c72cf72992e46535f679dc66f4a3b972d82bedf99514a395b937d45ff"],"state_sha256":"c069a0e6c74f68b41a1aece6a1e10748efb0fae807d4dcd2f789e6cae973e557"}